He's not human. (Discontinued)

Hello. My name is Prin Terna. If you're reading this, I'm trusting you to believe me and make use of the information I've found.
For the past few months, I have been stuck living in an apartment with what I believe to be an extraterrestrial lifeform. He has been trying to hide his identity, but he's failing miserably in my opinion. There are so many things he's failing to realize he's doing wrong.
I have created a plan to gain his trust to get him to admit to me that he's not human. I shall act on it soon.
Don't tell a soul.
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My name is TIZOW. I am Entfer #9683576363. I have successfully left my colony and moved to a new planet. This place is far different than anything I've ever seen, but that isn't necessarily a bad thing.
I have sheltered with a member of the most dominant species of this planet. I was given my part by the one I share it with. He said his name was "Prin". I've grown rather fond of him so far, he seems friendly.
I must blend in with the people here, though I know it won't be an easy task. I've probably already made too many mistakes.